Gain instant alerts when visitors arrive at your home with eufy's add-on chime, designed for eufy Video Doorbells. Receive instant app notifications. when a guest or delivery person rings the doorbell or motion is detected at the door. Customize the volume and select from 8 chime options while installation is a breeze. Simply plug the chime into a wall outlet, connect to your 2.4 GHZ wi-fi network then follow the app prompts. It expands video storage up to 128 GB with a microSD card (not included) and footage is stored locally and protected even if the video doorbell is damaged or lost.